<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>数组去重</title>

    <script>
        function unique(arr){

            var newArr = [];
            for (var i = 0; i < arr.length; i++) {
                
                if(newArr.indexOf(arr[i]) === -1){

                    newArr.push(arr[i]);

                }
                
            }

            return newArr;

        }
        //调用检验
        var arr1=['green','blue','blue','yellow'];
        console.log(unique(arr1));


    </script>


</head>
<body>
    
</body>
</html>